PXR40 datasheet(82/100 Pages) FREESCALE

82 / 100 page

PXR40 Microcontroller Data Sheet, Rev. 1

Electrical characteristics

Freescale Semiconductor

Figure 17. Nexus timings

TDI, TMS Data Setup Time

tNTDIS, tNTMSS

8—

TDI, TMS Data Hold Time

TNTDIH, tNTMSH

5—

TCK Low to TDO Data Valid

tNTDOV

010

RDY Valid to MCKO6

——

1 All Nexus timing relative to MCKO is measured from 50% of MCKO and 50% of the respective signal. Nexus timing specified

at VDD = 1.08 V to 1.32 V, VDDE = 3.0 V to 3.6 V, VDD33 and VDDSYN = 3.0 V to 3.6 V, TA =TL to TH, and CL = 30 pF with

DSC = 0b10.

2 The Nexus AUX port runs up to 82 MHz (pending characterization). Set NPC_PCR[MKCO_DIV] to correct division depending

on the system frequency, not to exceed maximum Nexus AUX port frequency.

3 See Notes on t

cyc on Figure 13 and Table 25 in Section Section 5.11.1 Clocking.

4 MDO, MSEO, and EVTO data is held valid until next MCKO low cycle.

5 Lower frequency is required to be fully compliant to standard.

6 The RDY pin timing is asynchronous to MCKO. The timing is guaranteed by design to function correctly.

Table 32. Nexus debug port timing1 (continued)

Spec

Characteristic

Symbol

Min

Max

Unit

MCKO

MDO

MSEO

EVTO

Output Data Valid

EVTI

PXR40 Datasheet(PDF) 82 Page - Freescale Semiconductor, Inc